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You have a flashlight that uses 0.75 watts of power and requires 1.5 volt battery.
How many joules of energy are used by the flashlight in 15 minutes? Hint: Joules are watts and seconds and you are computing the difference between the electric energy at two points A and B.
What the total charge q0? Hint: the statement of the problem provides delta V.
How many particles, each having a charge of 1.60 x 10^-6, are needed to produce the total charge at q0?
A 0.120 kg block on a horizontal frictionless surface is attached to the spring whose force constant is 572 N/m. The block is pulled from its equilibrium position at x = 0 m to a displacement x = +0.080 m and is released from rest. The block after th..
A helicopter is ascending vertically with a speed of 5.00m/s . At a height of 120m above the Earth, a package is dropped from a window. Evaluate how much time does it take for the package to reach the ground?
Find out the magnitude of the force exerted by the right pillar while a 90.0 diver stands at the far end of the board.
A car traveling at 93km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.75 m. What was average acceleration of the driver during the collision? Express the answer in terms of "g's," where 1.00g ..
The winner of the competition wants to know if he has broken the world record for the break shot of 32mph (about 14.3m/s). The ball landed a distance 5.15m away from the table edge, calculate his break shot speed. At what speed did his pool shot h..
A 4.90-g lead bullet traveling at 550 m/s is stopped by a large tree, what is the increase in temperature of the bullet
A space probe is launched from Earth, headed for deep space. At a distance of 15,000 miles from the Earth's center, the gravitational force on it is 800 lb. What is the size of the force when it is at 30,000 miles from the Earth's center?
Two charged bodies exert the force of .145N on each other. If they are moved so that they are one fourth as far apart, what force is exerted.
How much horizontal force should a sprinter of mass 57.0 exert on the starting blocks to produce this acceleration.
What is the difference between the acceleration of his head and feet if the astronaut is 2.00 m tall.
Their motions have equal periods, but the radius of skater A's circle is half that of skater B's circle. Evaluate the ratio of the magnitudes of the forces acting on each skater?
One mole of nickel (6E23 atoms) has a mass of 54 grams, and its density is 8.9 grams per cubic centimeter. You have a long thin bar of nickel, 2.0 m long, with a square cross section, 0.12 cm on the side.
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